The Lord has bound himself to work in the context and the confines of the covenantal line. This means that the promise made to Abraham must have a successor to receive that promise. Isaac is getting old, he has two children, but the Lord has chosen one child to be the heir of the promise. Isaac does not want to confer the blessing to the younger, but to the older. Is the Lord still able to establish His Sabbath people?
Sometimes as church members in America we can think that life is about me living for the Lord. This is not necessarily a bad thing as we should all individually want to live for the Lord. This is a mindset that really robs Christians of a great and higher understanding of the church. So, what is the bigger picture of the church? How does the Holy Spirit bless the church moving us beyond just a radical individual understanding of His blessings?